Wristwatch



FIG. 1 is front view of my new, original and ornamental design for awristwatch;

FIG. 2 is rear view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof; and,

FIG. 5 is a perspective view thereof.

The ornamental design for a wristwatch, as shown and described.